American Dryer Corp. ADG-320D Service Procedures
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American Dryer Corp. ADG-320D Service Procedures

American Dryer Corp. ADG-320D Service Procedures

24 vac phase 5 dual microprocessor controller (dmc) mechanical/electrical
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ADG-320D and ADG-330D
24 VAC Phase 5
Dual Microprocessor Controller (DMC)
Mechanical/Electrical

Service Procedures

American Dryer Corporation
88 Currant Road
Fall River, MA 02720-4781
Telephone: (508) 678-9000 / Fax: (508) 678-9447
e-mail: techsupport@amdry.com
www.amdry.com
062094
ADC Part No. 450303

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  • Page 1: Service Procedures

    ADG-320D and ADG-330D 24 VAC Phase 5 Dual Microprocessor Controller (DMC) Mechanical/Electrical Service Procedures American Dryer Corporation 88 Currant Road Fall River, MA 02720-4781 Telephone: (508) 678-9000 / Fax: (508) 678-9447 e-mail: techsupport@amdry.com www.amdry.com 062094 ADC Part No. 450303...

  • Page 2: Pour Votre Sécurité

    Retain This Manual In A Safe Place For Future Reference American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is properly maintained, it will provide many years of safe, efficient, and trouble free operation. ONLY qualified technicians should service this equipment.

  • Page 3: For Your Safety

    YOU MUST DISCONNECT AND LOCKOUT THE ELECTRIC SUPPLY AND THE GAS SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, OR TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health Administration) STANDARDS.
  • Page 4 DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER OR SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED. PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and specified in the installation manual included with the dryer. The wiring diagram for the dryer is located in the front electrical control box area.

  • Page 5: Table Of Contents

    SECTION I ROUTINE MAINTENANCE ... 3 A. Cleaning ... 3 B. Adjustments ... 4 C. Lubrication ... 4 SECTION II MECHANICAL ... 5 A. To Remove Lint Drawer ... 5 B. To Remove Control (Middle) or Lint (Lower) Door ... 5 C.
  • Page 6 SECTION III TROUBLESHOOTING ... 28 SECTION IV ELECTRICAL TROUBLESHOOTING... 36 SECTION V DATA LABEL INFORMATION ... 41 A. Data Label ... 41 B. Testing and Adjusting Gas Pressure ... 43 C. L.E.D. Display Codes ... 44 SECTION VI PHASE 5 DUAL MICROPROCESSOR CONTROLLER (DMC) SYSTEM DIAGNOSTICS ...

  • Page 7: Routine Maintenance

    ROUTINE MAINTENANCE A. CLEANING A program and/or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the ductwork system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper air circulation.

  • Page 8: Adjustments

    Remove lint accumulation from around the openings in the dryer’s back panels. Remove lint from gas valve burner train area with a dusting brush or vacuum cleaner attachment. Remove any lint accumulation from coin acceptor area, including the optical switch. Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from the dryer’s internal exhaust ducting.

  • Page 9: Mechanical

    A. TO REMOVE LINT DRAWER 1. Pull out lint drawer 3/4’s of the way (approximately 20 inches [50.8 cm]). 2. Reach up into the back of the lint drawer and pull down the retainer (hinge) that is attached to the top of the lint drawer.

  • Page 10: To Remove Control Box

    IMPORTANT: When removing the gas valve train assembly, be careful not to snag or damage the gas valve train wiring disconnected in Step #6. 8. Reverse procedure to reinstall the gas valve train assembly. NOTE: Be sure to open ALL gas shutoff valves closed prior to removing the gas valve train assembly. 9.

  • Page 11: To Remove/Replace Lint Drawer Switch Assembly

    5. Pull up the two (2) metal fingers where the door switch harness is secured to the frame and right side panel of the dryer. 6. Remove ALL nine (9) screws from the front panel. There are four (4) on the left side, four (4) on the right side, and one (1) at the bottom of the panel behind the control door.

  • Page 12: To Remove/Replace Belt

    4. To disassemble bracket assembly from dryer, disconnect the two (2) harness connectors. 5. To remove the temperature sensor and the connecting harness with its connectors: a. Disassemble microprocessor sensor probe from the bracket by removing the 1/4” push on fastener from the outside of the bracket.

  • Page 13: To Remove/Replace Motor

    10. The belt will come out from the front of the dryer between the basket (tumbler) and the wrapper. 11. Reverse procedure to install new belt. IMPORTANT: Be sure to set the proper belt tension at idler adjustment (follow Belt/Idler Tension Adjustment Procedure in Section K).
  • Page 14 14. Align impellor (fan/blower) to the center of the blower housing hole and remove impellor (fan/blower) by grasping fan with both hands and pulling outward. The key will also come off of the motor shaft in this procedure. 15. Return to the front of the dryer and disconnect the wiring harness from the motor. 16.

  • Page 15: To Remove/Replace Impellor (Fan/Blower)

    J. TO REMOVE/REPLACE IMPELLOR (FAN/BLOWER) 1. Discontinue power to the dryer. 2. Remove the lint drawer, the control/lint door, and the control box from the dryer (follow Control Box Removal Procedure in Section D). NOTE: If lower basket (tumbler) is being serviced, the control box does not have to be removed. 3.

  • Page 16: Belt/Idler Tension Adjustment

    14. The impellor (fan/blower) must now be adjusted/centered in the blower housing. Align the center of the motor shaft (at impellor [fan/blower]/shaft bearing), so that the center of the motor shaft is exactly 8- inches (20.32 cm) from the left side panel. a.

  • Page 17: To Remove Dual Microprocessor Controller (Dmc) Computer Panel Assembly

    L. TO REMOVE DUAL MICROPROCESSOR CONTROLLER (DMC) COMPUTER PANEL ASSEMBLY 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures in Section A and Section B). 3.

  • Page 18: To Replace Keyboard (Touch Pad)

    IMPORTANT: When installing the new Dual Microprocessor Controller (DMC) computer, make sure that the transformer on the DMC computer is located at the bottom area of the control panel. 9. Reverse Step #1 through Step #6. NOTE: When reconnecting the optic switch harness connector for single coin acceptor models, connect the harness to the lower of the two (2) connectors on the DMC computer.

  • Page 19: To Replace Coin Acceptor

    O. TO REPLACE COIN ACCEPTOR 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures in Section A and Section B). 3. Remove the screw located in the bottom right hand corner of the control panel. 4.

  • Page 20: Basket (Tumbler) Alignment (Vertical)

    Q. BASKET (TUMBLER) ALIGNMENT - VERTICAL (REFER TO PAGE 17) 1. Discontinue power to the dryer. 2. Remove the upper half of the rear split back guard panel to either the top or the bottom basket (tumbler), depending on which basket (tumbler) is being serviced. 3.
  • Page 21 b. To decrease gap R, loosen (turn counterclockwise [CCW]) adjustment bolt B and tighten (turn clockwise [CW]) adjustment bolt A. c. To increase gap L, loosen (turn counterclockwise [CCW]) adjustment bolt B and tighten (turn clockwise [CW]) adjustment bolt A. d.

  • Page 22: To Replace Basket (Tumbler) And/Or Basket (Tumbler) Support

    S. TO REPLACE BASKET (TUMBLER) AND/OR BASKET (TUMBLER) SUPPORT 1. Discontinue power to the dryer. 2. Remove the lint drawer and the control/lint door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures in Section A and Section B). 3.

  • Page 23: To Replace Basket (Tumbler) Support Pillow Block Bearing

    14. Make the necessary vertical alignment and lateral alignment adjustments (follow Basket [Tumbler] Vertical Alignment and Basket [Tumbler] Lateral Alignment Procedures in Section Q and Section R). 15. Reinstall both the upper and lower halves of the rear split back guard panels removed in Step #6. 16.
  • Page 24 4. Remove front panel from the basket (tumbler) being serviced (follow Front Panel Removal Procedure in Section E). 5. Remove belt from dryer (follow Belt Removal Procedure in Section H). 6. Remove the upper half of the rear split back guard panel to either the top or the bottom basket (tumbler), depending on which basket (tumbler) is being serviced.

  • Page 25: To Replace 330º (Burner) Hi-Limit Switch (Thermostat)

    V. TO REPLACE 330º (BURNER) HI-LIMIT SWITCH (THERMOSTAT) NOTE: The 330º (burner) hi-limit switch (thermostat) is located on the burner box chamber at the rear of dryer. 1. Discontinue power to the dryer. 2. Remove the lower half of the split back guard panel to either the top or the bottom basket (tumbler), depending on which basket (tumbler) is being serviced.

  • Page 26: To Replace Main Door Switch

    X. TO REPLACE MAIN DOOR SWITCH 1. Discontinue power to the dryer. 2. Open the main door completely. 3. Remove the two (2) Phillips head screws holding the main door switch housing in place. 4. Disconnect the main door switch wires from the switch (two [2] yellow wires). 5.

  • Page 27: To Replace Ignitor/Probe Assembly

    Z. TO REPLACE IGNITOR/PROBE ASSEMBLY 1. Discontinue power to the dryer. 2. Remove the lint drawer, the control/lint door, and the gas valve train assembly from dryer (follow Gas Valve Train Removal Procedure in Section C). 3. To replace either ignitor probe or flame sensor probe, simply remove Phillips head screw holding device to bracket and disconnect wire.

  • Page 28: Bb. To Convert Dryer From Natural Gas To Liquid Propane (L.p.) Gas

    10. Reinstall the control/lint door and the lint drawer removed in Step #3. 11. Open ALL shutoff valves closed in Step #2. 12. Reestablish power to the dryer. BB. TO CONVERT DRYER FROM NATURAL GAS TO LIQUID PROPANE (L.P.) 1. Discontinue power to the dryer. 2.

  • Page 29: Cc. To Replace Coin Vault

    13. Reestablish power to the dryer. CC. TO REPLACE COIN VAULT 1. Discontinue power to the dryer. 2. Remove both the upper and lower lint drawers and the control/lint doors from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures in Section A and Section B). 3.

  • Page 30: Ee. To Install New Main Door Glass

    EE. TO INSTALL NEW MAIN DOOR GLASS 1. Remove the main door assembly from the dryer (follow Main Door Removal Procedure in Section DD). 2. Lay main door on flat surface with front of door face down. 3. Apply a narrow bead of silicone (ADC P/N: 170730) ALL around the main door area where the glass will rest.
  • Page 31 3. Remove the main door switch housing from the front panel (follow Main Door Switch Replacement Procedure in Section X). 4. Disassemble main door hinge from the front panel by removing the four (4) nuts securing hinge to back side of the front panel.

  • Page 32: Troubleshooting

    The information provided is a quick reference to help isolate the most probable component(s) associated with the difficulty described. The experienced technician realizes, however, that a loose connection or broken or shorted wire may be at fault where electrical components are concerned...not necessarily the suspect component itself. Electrical parts should be checked for failure before being returned to the factory.
  • Page 33 D. The dryer will not stop, even with no cycle (light emitting diode [L.E.D.] display reads “FILL”) in progress... 1. Failed motor contactor/relay. E. The dryer operates for a few minutes, and with the dual microprocessor controller (DMC) computer motor L.E.D. indicator dot on, the motor stops, and then after a period of time restarts on its own...
  • Page 34 3. Parameter in Program Location 01 (PL01) set incorrectly. a. Bad coin program should be set for “bCrS” and not “bCLO.” Dual Microprocessor Controller (DMC) computer light emitting diode (L.E.D.) display reads “dSFL”... 1. L.E.D. display consistently reads “dSFL” and will not clear... a.
  • Page 35 K. Dual Microprocessor Controller (DMC) computer light emitting diode (L.E.D.) display reads “SEFL”... The “SEFL” display condition indicates a rotational sensor circuit failure, which means that there is a fault somewhere in the basket (tumbler) rotation detection circuit...or...the DMC computer program related to this circuit (PL01) is set incorrectly in the active mode (“SEn”) where the dryer is not equipped with the optional rotational sensor and should be set in the nonactive mode (“nSEn”).
  • Page 36 If dryer does not have optional battery back up... 1. Loose connection somewhere in the power sourc to the dryer. 2. Loose connection in main power circuit to the dual microprocessor controller (DMC) computer. 3. Improper grounding of the dryer or the DMC computer ground connections to the panel or the dryer are not proper.
  • Page 37 4. Failed Direct Spark Ignition (DSI) module. 5. Failed gas valve. R. No heat (gas models only)...ignitor sparks, burner goes on and off right away... 1. DSI flame sensor (probe) is out of adjustment...reposition closer to the flame area. 2. Failed DSI flame sensor probe. 3.
  • Page 38 4. Failed steam damper 24 VAC pneumatic solenoid switch. 5. Failed steam damper piston. U. Dryer operates, but is taking too long to dry... 1. Exhaust ductwork run is too long or is undersized...back pressure must be no less than 0 and cannot exceed 0.3 inches (0.74 mb) water column (W.C.).
  • Page 39 W. Dryer is making scraping noise at basket (tumbler) area... 1. Check for object(s) caught in the basket (tumbler) wrapper area. 2. Basket (tumbler) is out of proper alignment... a. Check both the vertical alignment and lateral alignment. b. Check gap between the front panel and the basket (tumbler) front...setscrews may have come loose and basket (tumbler) walked forwards or backwards.

  • Page 40: Electrical Troubleshooting

    ELECTRICAL TROUBLESHOOTING NOTE: Diagrams used in this section include: B474721, B472611, B483751, and ALL the revisions (a revision is the letter after the number ‘ie’...B474721 B.) NOTE: A VOLT/OHM meter is needed for this section. A. No Display Condition... 1. Check top pocket circuit breaker panel for this particular dryer. If tripped, reset. 2.
  • Page 41 If voltage is present: a. Manually push down the top of the contactor. If motor turns, replace the contactor. b. If motor does not turn, problem is bad wire(s) or termination(s) from contactor down to the motor or faulty motor. NOTE: Make sure high voltage (110-240V) is present across the top half of the contactor.
  • Page 42 7. If no voltage, replace the computer. D. “No Heat” Condition (electric models) NOTE: The following sections must be performed with the appropriate output light emitting diode (L.E.D.) and appropriate L.E.D. indicator dots on. Make sure sail switch damper is closing properly.
  • Page 43 NOTE: In the following steps, when checking the voltage leave one of your meter leads attached to terminal block #7 or any good ground connection. NOTE: The following sections must be performed with the appropriate output light emitting diode (L.E.D.) and appropriate L.E.D. indicator dots on. 1.
  • Page 44 4. Check for voltage on pin #2 (yellow wire) of the computer 9-pin connector (top 9-pin connector is for the top basket [tumbler] and bottom 9-pin connector is for the bottom basket [tumbler]). If voltage is present, replace the computer. 5.

  • Page 45: Data Label Information

    SECTION V DATA LABEL INFORMATION A. DATA LABEL Contact American Dryer Corporation When contacting American Dryer Corporation, certain information is required to insure proper service/parts information from ADC. This information is on the data label located on the inside of the control door. When contacting ADC, please have the model number and serial number available.
  • Page 46 THE DATA LABEL 1. MODEL NUMBER The model number is an ADC number, which describes the size of the dryer and the type of heat (gas, electric, or steam). 2. SERIAL NUMBER The serial number allows ADC to gather information on your particular dryer. 3.

  • Page 47: Testing And Adjusting Gas Pressure

    B. TESTING AND ADJUSTING GAS PRESSURE There are two (2) types of devices commonly used to measure water column pressure. They are spring/mechanical-type gauge and manometer. The spring/ mechanical-type gauge is not recommended, because it is easily damaged and not always accurate. A manometer is simply a glass or transparent plastic tube with a scale in inches.

  • Page 48: Display Codes

    C. L.E.D. DISPLAY CODES Automatic Cycle (Slope Program Factor) ACOn Accumulative Coin Adrt Maximum Auto Dryness Time AFAt Amount for Additional Time Active Anti-Wrinkle Guard Time AtIn Accumulative Time AtSt Amount to Start AUtO Automatic Mode (Patent No. 4,827,627) Automatic Cycle (Heat Loss [offset] Factor) bCLO Bad Coin Lockout bCrS...

  • Page 49: Phase 5 Dual Microprocessor Controller (Dmc) System Diagnostics

    PHASE 5 DUAL MICROPROCESSOR CONTROLLER (DMC) ALL major circuits, including door, lint drawer, microprocessor temperature sensor, heat and motor circuits are monitored. The Phase 5 DMC computer will inform the user, via the light emitting diode (L.E.D.) display and at the outputs of each relay (and door switch circuit) to easily identify failures.

  • Page 50: Display Indicators (Dots)

    4. “Hot” a. Indicates a possible overheating condition. The Phase 5 Dual Microprocessor Controller (DMC) computer monitors the temperature in the dryer at ALL times. If the Phase 5 DMC computer detects that the temperature in the dryer has exceeded 170º F (77º C), it will disable ALL the outputs (shut the dryer down), the tone (buzzer) will sound for approximately 5-seconds and the display will read “Hot.”...

  • Page 51: Phase 5 Dmc Computer Input/Output L.e.d. Indicators

    2. “HEAT” Output light emitting diode (L.E.D.) Indicator a. If the dryer is started and there is no heat, yet the Phase 5 Dual Microprocessor Controller (DMC) computer display heat circuit indicator dot is on, but the “HEAT” output L.E.D. indicator is off, then the fault is in the Phase 5 DMC computer itself.

  • Page 52: Section Vii

    PHASE 5 DUAL MICROPROCESSOR CONTROLLER (DMC) PROGRAMMING LIMITS Phase 5 Dual M icroprocessor Controller Programming Limits Program Parameter Location PL02 “PdrY” Auto Cycle percentage of dryness 90% to 100% PL03 “HI” Drying Temperature PL04 “HI” Cool Down Temperature “ HI” Cool Down Time PL05 “LO”...
  • Page 53 ADC 450303 1 - 04/04/94-10 4 - 05/08/95-50 7 - 01/30/98-50 10 - 08/12/99-100 13 - 09/07/01-100 2 - 06/03/94-100 3 * 11/21/94-200 5 * 10/30/95-200 6 * 12/03/96-200 8 * 06/05/98-50 9 - 09/10/98-100 11 - 06/08/00-100 12 - 09/26/00-75 14 - 04/11/03-10 15 * 06/13/03-15...

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Adg-330d

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